clintropolis commented on a change in pull request #10463:
URL: https://github.com/apache/druid/pull/10463#discussion_r499031039
##########
File path:
integration-tests/src/main/java/org/apache/druid/testing/DockerConfigProvider.java
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@@ -260,4 +269,32 @@ public String getStreamEndpoint()
}
};
}
+
+ // there is probably a better way to do this...
+ static class ArbitraryPropertiesJsonDeserializer extends
JsonDeserializer<Map<String, String>>
+ {
+ @Override
+ public Map<String, String> deserialize(JsonParser jsonParser,
DeserializationContext deserializationContext)
+ throws IOException
+ {
+ // reading like this results in a map that has both nested objects and
also flattened string pairs
+ // so the map looks something like this:
+
+ // {
+ // "a" : { "b": { "c" : "d" }}},
+ // "a.b.c":"d"
+ // }
+
+ // filtering out the top level keys which do not have string values
produces what we want here that
+ // '-Ddruid.test.config.properites.some.property.key=foo' -> {
"some.property.key":"foo"}
+ Map<String, Object> parsed = jsonParser.readValueAs(Map.class);
+ Map<String, String> flat = new HashMap<>();
+ for (Map.Entry<String, Object> entry : parsed.entrySet()) {
+ if (entry.getValue() instanceof String) {
+ flat.put(entry.getKey(), (String) entry.getValue());
+ }
+ }
Review comment:
TBH I'm not entirely sure why the map ends up like it does coming from
jackson, but I tried to explain what is going on here in the comments above.
This block is just filtering out non-string values, leaving only the flat map
after it is done.
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